You know, personally I don't care about time. What I care about is content. So let's separate those two.
If you have a dev that goes on hiatus, that slugs along and only works on it every other week, etc and then you get an update every 6 months with 400 renders, well that's bad. I don't support this type of dev.
But if you have a dev only delivering one update every 6 months but it has 1000 renders well then that's fine by me.
So to be fair, Rainces disappeared but then suddenly came back and delivered an update with thousands of renders and the last one followed suit. If he came back after 6 months of silence with an update of 300 renders it would be totally different.
From what I've seen from Zip, he's the first type of dev. He works on this when he wants or cans so if he takes 2 more months to release that doesn't mean it will have another 300 renders because of it, it's just empty time.
But who knows, maybe these delays just mean he keeps having new and great ideas and keeps adding content to the game every day